CVE-2026-54249Network attack vectorHinoki check available

Cloud file disclosure via unvalidated UploadedFile references

Published Jul 29, 2026 · Updated Jul 29, 2026

SSRF in Pydantic AI and Pydantic AI Slim 1.65.0 through 1.105.0 and 2.0.0b1 through 2.0.0b5 allows remote attackers to read cloud files. UI adapters reconstruct UploadedFile parts from client-submitted history and forward unvalidated provider IDs or cloud-storage URIs for resolution with server credentials. Exploitation requires an application to pass untrusted history through an affected adapter and a valid referenceable file identifier; access is limited to files available to the server identity.

CVSS severity6.8
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in Pydantic AI and Pydantic AI Slim 1.65.0 through 1.105.0 and 2.0.0b1 through 2.0.0b5 allows remote attackers to read cloud files. UI adapters reconstruct UploadedFile parts from client-submitted history and forward unvalidated provider IDs or cloud-storage URIs for resolution with server credentials. Exploitation requires an application to pass untrusted history through an affected adapter and a valid referenceable file identifier; access is limited to files available to the server identity.

The record

CVE
CVE-2026-54249
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
Pydantic
Product
Pydantic AI Slim
Classifications
CWE-918, T1530
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.65.0, < 1.106.0
  2. Affected versionversion=>= 2.0.0b1, < 2.0.0b6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pydantic · Pydantic AI Slimversion=>= 1.65.0, < 1.106.0; version=>= 2.0.0b1, < 2.0.0b6
Pydantic · Pydantic AIversion=>= 1.65.0, < 1.106.0; version=>= 2.0.0b1, < 2.0.0b6

Published CVSS scores

6.8GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1530Data from Cloud Storage

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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